Steam set-works for sawmills



No. 608,0!8. Patented .luly 26, |898..

R. F. BAKKER &. M. CRRY.

STEAM SET WORKS FOR SAWMILLS.

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No. 608,0la.

Patented July 26, |898 R. F. BARKER & M. CORRY. STEAM SET WORKS FDR SWMILLS.

(Application led Mar. 8, 1898.)

4 Sheets-Shee 2.

(No Model.)

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Patented Juiy 26, 1898. s. F. BARKER & M. conRY. STEAM SET 'WORKS FR SAWMILLS.

(Application f-lefd` Mur. 8, 1898.)

4 Sheets-Sheet 3.

(No Model.)

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R. F. BARKEH & M. SORRY. STEAM SET` WORKS FOR SAWMILLS.

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without departing from the spirit of our inivrrnn t l. "t ti RUBEN F. BARKER AND MICHAEL CORRY, OF MARINETTE, VISCONSIN. Y

`STEAM SET-WORKS FOR SAWIVIILLS.

SPECIFICATION forming part of Letters Patent No. eos,o18,eeted July 2c, 1898.

`.llpplioation tiled March 8, 1893.:

T all whom, it may concern:

Be it known that we, RUBEN F. BARKER and MICHAEL Conax, citizens of the United States, residing at Marinette, in the county of Marinette and State of Wisconsin, have invented certain new and Iuseful Improvements in Steam Set-forks for Sawmills; and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to improvements in hand-control steam-actuated set-works for sawmill-carriages; and the object is to provide a simple and effective device for accu# rately adjusting the set-Works so as to cut boards of uniform thickness and of any de-v sired thickness as well.

To this end the invention consists in the construction, combination, andarrangement of the device, as will be hereinafter more fully described, and particularlypointed out in the claim.

The accompanyingr drawingsshow our invention in the best form now known to us; but many changes in the details might be made within the skill of 'a good mechanic vention as set forth in the claim at the of this specification.

The same reference characters indicate the same parts of the invention.

Figure l is a perspectiveyiewof our improved set-works. Fig. 2l is a similar view taken from the opposite side.` Fig. 3 is a top plan view. Fig. 4 is a central transverse section. Fig. 5 is a horizontal section. Fig. 6 is a longitudinal section through one of the oil-cylinders.

1 denotes the carriage-timber, and 2 a casting formed withV an integral right-angular bracket 3, which is bolted to the timber.

4 represents the steam-cylinder, and 5 5 the oilcylinders, arranged parallel with, in the` same horizontal plane, anden opposite sides of the steam-cylinder.

6 represents the valve-chest of the steamcylinder, and it is provided with the usual form of balanced piston-valve for controlling the live and exhaust steam.

7 denotes the valve-stem, and its outer end end is pivoted to the lower end of a depending Serial N o. 673,098. (No model.)

arm 8, fixed to the longitudinal shaft 9, and 10 denotes a hand-lever fixed to said shaft for conveniently manipulating the valve.

4 12 denotesthe steam pistonrod, the outer lend of which is fixed to the cross-head 13, and 14 14 represent the piston-rods of the oil-cylinders, also fixed to the cross-head on opposite sides of and in the same horizontal plane with the steam piston-rod.

V15 15 represent the.parallel` cylindrical guide-rods on which the cross-head reciprocates, and their inner ends are fixed in the integral web 4connecting the cylinders and their outer ends in the vertical lugs 16 16 of Vof the inclined arm 17,'for1ned integral with the, bracket 2. l

18 denotes a horizontal bar iixed at its inner end to the front face of the cylinder-casting, and its outer end is turned downwardly and is secured to the arm 17, and 19 denotes au adj ustablefscale secured to the upper face of said bar, vwhile 20 represents a gage or pointer traversing said scale, and it is formed on the upperend of a vertical arm 21, iixed to a cross-head 22, having a reciprocating movement on the outer ends of the fixed guide-rods 15 15. f l

23 24 denote a pair of differential pawls, fulcrumed to the under side of the cross-head 22,- which alternately engage the teeth on the ratchet-plate 24', adjustably secured to the arm 17 by the retaining-bolts 25 and the adn justing-screw 26.

27 represents 'a yoke extending outward 4from the cross-head 22, and it is pivoted by a bolt 28 to a hand-lever 29, fulcrumed at its lower end tothe strap 30, pivoted to the arm 17 31 denotes a verticalguide-socket formed integral with the yoke 27, and 32 denotes a vertical bar reciprocating in said guide-socket, its lower end being turned horizontally inward to form the arm 33, which extends through a groove 34, formed in the ratchet-plate 24 and beneath the free ends of the pawls. The upper end of the bar 32 is threaded to receive thebifurcatedjaw 35, which extends on each side of the lever 29, and 36 represents a handgrip pivoted to the upper end of the handa lever 29, and a connecting-rod 37 extends from grip 36 to the jaw 35, so that when the grip is drawn in parallel with the handle the arm 33 raises the pawls 23 24, and when these are IOO released the cross-head 22 may be moved in Vor out on the guide-rods, the eXact distance to which it is set being determined by the gage 20, and as this cross-head 22 forms the limitstop for the outward movement of the cross-head 13 and as the lock-nuts 38 39 on the inner ends of the guide-rods limit the play of the cross-head in the opposite direction the length of stroke or travel of the head 13 can be regulated to the fraction of an inch.

40 denotes a longitudinal shaft which operates the knees, (not shown,) and 41 denotes the ratchet-wheels, by means of which said shaft is intermittently rotated. A countershaft 42 is j ournaled in the bearings 43 in the casting 2, and it is provided with the rocking arms 44, carrying the pawls 45, which actuate the ratchet-Wheels 41.

47 and 4S denote vertical arms rigidly iixed to said counter-shaft, and their upper diskshaped ends 49 extend into the grooves 50 50, formed in the opposite ends of the cross-head 13, so that by the mechanism just described the movement of the cross-head is communicated to the knees.

Referring to Fig. 6, 51 represents the piston on the rod 14, and 52 denotes a pipe eX- tending from one end of the oil-cylinder to the other, so that when steam is admitted to one end of the steam-cylinder the movement of the steam-piston is communicated to the oil-cylinder pistons through the medium of the cross-head 13, the oil in the cylinder being forced from one end of the oil-cylinders to the other through the connecting-pipe, and by means of the valve 53 the passage of the oil is regulated so as to control the movement of the steam-piston and cross-head 13, the oil acting as a cushion or buffer, Which prevents all tendency to irregular or jerking movement of the cross-head, but on the contrary insures a perfectly uniform, regular, and steady movement of the knees.

The operation of the device is very simple and under perfect control at all times, one move being all that is required to manipulate it, for with one hand on the lever 29 one can instantly regulate the thickness of the boards and with the hand on the lever 1() can move the log the exact distance required and which is predetermined by the movement of the cross-head 13.

Having thus fully described our invention, What We claim as new and useful, and desire to secure by Letters Patent of the United States, 1s-

The combination, in a sawmill set-works, of the steam-cylinder 4, the parallel guiderods 15 15 having their inner threaded ends fixed to said cylinder, the bracket 2 formed with the integral arm 17 and vertical lugs 16 16 forming a support for the outer ends of said guide-rods, the cross-head 22 adj ustably secured on the outer ends of said rods and the adjusting-nuts 38 39 secured on the inner threaded ends of said rods, the piston-rod cross-head 13 mounted on said rods and adapted to have its movement in either direction limited by said adjustable cross-head 22 and nuts 38 39 and means, substantially as described, for transmitting the movement of said piston-rod cross-head to the knees, as and for the purpose set forth.

In testimony whereof we have hereunto set our hands in the presence of two subscribing Witnesses.

RUBEN F. BARKER. MICHAEL CORRY.

Vitnesses:

P. A. MARTINEAU, CHARLES H. DAvIs. 

